'Certainly Not' in the Bible

Do we then render law invalid through faith? Certainly not; on the contrary we make it stand.

What then? Shall we commit an act of sin because we are not under law, but under grace? Certainly not.

What shall we say then? Is the Law sin? Certainly not. On the contrary I should not have become acquainted with sin had it not been for the Law; for except the Law had repeatedly said, "Thou shalt not lust," I should never have known the sin of lust.